67 ^ 



D. 7 — 5—03. Anholt lighthouse in N. to W., ca. 6 miles, 22 fm. (southern Kattegat). 

 Young-fish trawl on bottom: 1 Lumpenus, ca. 4 fm. 



D. 12—7—04. Anholt lighthouse in N. W. to W., 5'/, miles, 21 fm. Young-fish trawl 

 on bottom: 2 Lumpenus, one of which was ca. 6 cm. 



The young of Lumpenus thns require soff ground in deep water, ahout 20 fm., 

 to le able to change over to tJie hottom-stage. The older stages are also found to- 

 gether with the bottom-stages, and we may form the following rule, based on our 

 many catches of Lumpenus: Lumpenus are to be found everywhere where there 

 is soft bottom at a depth of ca. 20 fm., many in the southern Danish waters, few 

 in the Kattegat. Where there is soft ground at a less depth, a few are to be 

 found in the southern waters, none in the Kattegat. 



The growth of Lumpenus is specially easy to determine, both the young 

 and old specimens, as mentioned before, being taken in tlie same hauL From the 

 measurements it will be seen, that the Lumpenus in tlie western Baltic have a 

 length of at least 6^j, inches (ca. 17 cm.) at the end of their third gear. It hecomes 

 mature then and tlie ordinary groivth ceases. Tab. L shows, that the growth in the 

 true Baltic is almost as in the -western. 



Guniiel, Centronotus gunelhis. 



No observations have been made by the Biologicai Station regarding the 

 spawning of this species. 



The pelagie yonilg were observed in Fænø Sound in Fehuary — 3Iay 

 1891 — 92, and they were taken in the collections of 1890 — 1901 in January — April 

 in the Great Belt, Kattegat and Skager Rak, in January only in the Great Belt 

 and southern Kattegat, in April only in the Skager Rak. 



In 1892 the pelagic young of the gunnel were found in Marcli and begin- 

 ning of April in Fænø Sound. On May 2nd a specimen was taken in a bottom- 

 haul with the young-fish tra^\■l. 



In 1903 the pelagic gunnel young were taken in February and March. 

 We found them in the true Baltic, Great Belt and Kattegat. The catches in the 

 true Baltic are not put down on Tab. 3 A, as they were made with the pelagic 

 net. I mention them here therefore: 



D. 27 — 2 — 03. Hestehoved in W. '/., N., 12 fm. Pelagic net on pole, 15 minutes: ca. 

 100 fish young, amongst whicli 1 young nf gunnel. 



D. 27—3—03. Gedser lighthouse in W. to S. 7, S., 7* , miles, 10 fm. Pelagic net on 

 pole: 11 fish young, amongst which 1 young of gunnel. 



Ehrenbaum and Strodtmann found a small uumber of pelagic gunnel young 

 in the western and true Baltic in 1903, namely, 4 in February in the western Baltic 

 and 1 "noch jugendhch" in November in the true Baltic between Trelleborg and 

 Sassnitz. 



In 1904 (Tab. 1) we took the pelagic young of the gunnel from February 

 to June, but in June only in the beginning of the month, taking one in Aalbæk 

 Bay on June Ist and two at Anholt on June 4th (see Tab. 1, Kattegat). 



The distribution of the pelagic young of the gunnel is fairly northern, 

 especially in comparison with the pelagic young of Lumpenus. This appears clearly 

 from Tab. 3 B. In the Kattegat, where we only found them in March along with 

 a few pelagic young of Lumpenus, we found the pelagic young of the gunnel in 



